JP7397871B2 - shoes - Google Patents

Description

The present invention relates to shoes.

2. Description of the Related Art Shoes are known in which a cushioning member such as a midsole is provided between an upper and a sole. For example, Patent Document 1 describes footwear having a removable outsole, a midsole, and an upper. The lower surface of the midsole of this footwear has a plurality of protrusions that fit into pockets of the outsole. The protrusions are separated by slots to mate with raised walls provided in the pocket. Furthermore, this footwear is configured so that it can be customized for each user by replacing the midsole and the like.

US Patent No. 9737109 International Publication No. 2014/115284 Japanese Patent Application Publication No. 2012-501717 US Patent Application Publication No. 2017/0303631 US Patent Application Publication No. 2017/0251761 US Patent Application Publication No. 2018/0192737

The present inventors have obtained the following knowledge regarding shoes having a cushioning member.
In order to improve the feel of the foot and ensure comfort when putting the foot in the shoe, the cushioning member is made softer and the displacement of the cushioning member in response to the load received from the foot (hereinafter simply referred to as "load") is increased. This is desirable. However, if the displacement of the cushioning member with respect to the load is increased, the foot position of the shoe will change greatly during high loads such as running, resulting in a decrease in stability and fit.

Furthermore, in order to improve stability under high loads, if the displacement of the shock absorbing member with respect to the load is reduced, the foot contact of the shock absorbing member becomes poor, which is disadvantageous in terms of comfort.

In the footwear described in Patent Document 1, the midsole is configured to be replaceable in order to ensure comfort according to the user's preference, but different characteristics cannot be obtained with a single midsole. Based on these findings, the inventor of the present invention recognized that there is room for improvement in conventional footwear from the viewpoint of achieving a good balance between comfort and stability.

The present invention has been made in view of these problems, and its purpose is to provide shoes that can achieve both comfort and stability in a well-balanced manner.

In order to solve the above problems, a shoe according to an aspect of the present invention includes a sole, an upper provided above the sole and surrounding a foot insertion part, and a buffer member housed in the foot insertion part. The lower surface of the cushioning member includes a convex portion that protrudes toward the opposite surface facing the lower surface, a concave portion that is adjacent to the convex portion and is recessed toward the upper side of the convex portion, and a concave portion that is adjacent to the convex portion and is recessed toward the upper side of the convex portion, and a convex portion that is closer to the opposite surface than the convex portion around the concave portion. A peripheral convex portion protruding to the side is provided, and when the buffer member receives a predetermined first load, the peripheral convex portion contacts the opposing surface, the convex portion does not contact the opposing surface, and the buffer member When receiving a predetermined second load greater than one load, the peripheral convex portion and the convex portion contact the opposing surface.

Furthermore, any combination of the above, or mutual substitution of the components and expressions of the present invention among methods, apparatuses, programs, temporary or non-temporary storage media recording programs, systems, etc. This is effective as an aspect of the present invention.

According to the present invention, it is possible to provide shoes that can achieve both comfort and stability in a well-balanced manner.

1 is a plan view schematically showing a shoe according to a first embodiment of the present invention. FIG. 2 is a plan view showing the cushioning member of the shoe of FIG. 1; 3 is a side view showing the buffer member of FIG. 2. FIG. 3 is a bottom view showing the buffer member of FIG. 2. FIG. 3 is a graph showing the relationship between load and displacement of the buffer member in FIG. 2. FIG. FIG. 3 is a longitudinal cross-sectional view of the buffer member in FIG. 2 taken along line AA. 3 is another vertical cross-sectional view taken along line AA of the buffer member in FIG. 2. FIG. FIG. 3 is a plan view showing the contours of the buffer member and upper of FIG. 2; FIG. 3 is a plan view showing changes in the contour of the buffer member in FIG. 2; 3 is another graph showing the relationship between load and displacement of the buffer member in FIG. 2. FIG. FIG. 3 is a cross-sectional view taken along line AA of a buffer member including a deformation limiting portion. FIG. 7 is a cross-sectional view taken along line AA of a buffer member including another deformation limiting portion. FIG. 4 is a cross-sectional view taken along line AA of a cushioning member having different widths on the inner foot side and the outer foot side of the main body. FIG. 3 is a cross-sectional view taken along line AA of a cushioning member having different coefficients of friction on the inner leg side and the outer leg side of the main body. FIG. 3 is a perspective view schematically showing a shoe according to a second embodiment of the present invention. FIG. 16 is a side view of the shoe of FIG. 15; FIG. 16 is a plan view of the shoe of FIG. 15; 16 is a sectional view taken along line BB of the shoe of FIG. 15. FIG. 16 is a side view showing another example of the shape of the interlocking member of the shoe shown in FIG. 15. FIG. 16 is a side view showing another example of the shape of the interlocking member of the shoe shown in FIG. 15. FIG. It is a top view which shows the buffer member based on the 1st modification. It is a top view which shows the 1st example of a shape of the buffer member based on a modification. It is a top view which shows the 2nd example of a shape of the buffer member based on a modification. It is a top view which shows the 3rd example of a shape of the buffer member based on a modification. It is a top view which shows the 4th example of a shape of the buffer member based on a modification. FIG. 7 is a longitudinal cross-sectional view taken along line AA of a buffer member according to a modified example. 27 is another vertical cross-sectional view taken along line AA of the buffer member in FIG. 26. FIG. FIG. 7 is a sectional view taken along line BB of a shoe according to a modified example.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on preferred embodiments with reference to the drawings. In the embodiments and modified examples, the same or equivalent components and members are given the same reference numerals, and redundant explanations will be omitted as appropriate. Further, the dimensions of members in each drawing are shown enlarged or reduced as appropriate to facilitate understanding. Further, in each drawing, some members that are not important for explaining the embodiments are omitted.

Also, although ordinal terms such as first, second, etc. are used to describe various components, these terms are used only to distinguish one component from another; The components are not limited by this.

[First embodiment]
Hereinafter, the configuration of the shoe 100 according to the first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a plan view schematically showing a shoe 100 according to the first embodiment. Although the following figures, including FIG. 1, show a shoe for the right foot unless otherwise specified, the description herein is equally applicable to a shoe for the left foot. Additionally, the illustrations below do not show the shoelaces.

The shoes 100 of this embodiment can be used, for example, as shoes for walking or running, safety shoes, shoes for sports such as tennis or basketball, and the use thereof is not limited. Shoe 100 has a sole 10, an upper 20, and a buffer member 30. The sole 10 is a part for contacting the ground. Upper 20 has a foot insertion portion 20a surrounding an interior space for accommodating a foot. The upper 20 is fixed above the sole 10 by adhesive or other means. The buffer member 30 is housed within the foot insertion portion 20a. These will be explained in detail below.

(upper)
As shown in FIG. 1, the direction along the widthwise center line La of the upper 20 is referred to as the "front-back direction." Therefore, the width direction is perpendicular to the center line La. The direction toward the toe side along the center line La is referred to as the "front side" or "front", and the opposite side is referred to as the "rear side" or "rear". Further, in the width direction, the direction from the outer foot side to the inner foot side is referred to as "medial" or "medial", and the opposite direction is referred to as "lateral" or "lateral". Further, when the shoe 100 is placed on a horizontal surface (hereinafter referred to as the "horizontal state"), the upper side is referred to as the "upper side" or "upper side", and the opposite side is referred to as the "lower side" or "lower side". Furthermore, in a horizontal state, the direction extending vertically is referred to as the "vertical direction."

Further, the portion of the upper 20 that corresponds to the metatarsal bones in the front-rear direction is referred to as a midfoot portion. Further, in the upper 20, the portion in front of the midfoot in the front-rear direction is referred to as a forefoot, and the portion behind the midfoot is referred to as a hindfoot. The forefoot portion generally corresponds to the phalanges, and the hindfoot portion generally corresponds to the tarsal bones. When the front-to-back length of the shoe 100 is taken as 100%, the midfoot is an area that is approximately 30% to 80% from the tip, in a range parallel to a straight line orthogonal to the center line La. Similarly, the forefoot is approximately 0% to 30% from the tip, and the hindfoot is approximately 80% to 100% from the tip.

A shoe opening 20b for inserting the foot is provided on the rear side of the upper 20. A central opening 20c is provided forward from the opening 20b of the upper 20. An eyelet 20h is provided at the edge of the central opening 20c of the upper 20 to allow the shoelace to pass through. A shoe tongue 70 is provided inside the central opening 20c. Note that the central opening 20c is not an essential configuration, and the upper 20 may have a so-called monosock structure. Moreover, it is not essential to provide the eyelet 20h and the tongue 70.

(Buffer member)
The buffer member 30 will be explained. The cushioning member 30 is made of a flexible material, and is interposed between the wearer's foot and the sole 10 when the wearer wears the shoe 100, and cushions the impact applied to the foot. The buffer member 30 functions as an insole. FIG. 2 is a plan view of the buffer member 30. FIG. 3 is a side view of the buffer member 30. FIG. 4 is a bottom view of the buffer member 30.

The present inventors studied the buffer member 30 from the viewpoint of achieving both comfort and stability in a well-balanced manner, and obtained the following knowledge. FIG. 5 is a graph showing the relationship between the load and displacement of the buffer member 30. In this graph, the horizontal axis shows the displacement D, and the vertical axis shows the load F. The scales on the horizontal and vertical axes indicate relative levels to a predetermined reference value. The graph g1 and the graph g2 show the load F (hereinafter referred to as "displacement gradient") with respect to the displacement D. Graph g1 shows a case where the displacement gradient is larger and softer than graph g2, and graph g2 shows a case where the displacement gradient is smaller and harder than graph g1.

In order to improve the foot contact when the foot enters, it is desirable that the displacement gradient be large and soft as shown in graph g1. However, if the displacement gradient is large, the displacement D becomes excessive during high loads such as when traveling, and stability and durability deteriorate. Therefore, when the load is high, it is desirable that the displacement gradient is small and hard, as shown in graph g2. Based on these facts, the inventors came up with a configuration in which the displacement gradient is changed depending on the magnitude of the load F that the buffer member 30 receives (see graph g3). Furthermore, it has been found that when the load F is large, the displacement gradient changes by increasing the contact area between the buffer member 30 and the opposing surface 16 facing the lower surface thereof. A configuration example for realizing the characteristics shown in graph g3 will be described below.

Return to FIGS. 2 to 4. As shown in FIGS. 2 and 3, the upper surface 30e of the buffer member 30 is provided with edge protrusions 30h and 30j. The edge protrusions 30h, 30j protrude from the upper surface 30e from the inner foot side to the outer foot side so as to surround the periphery of the heel. The top line of the edge protrusion 30h on the inner foot side is provided at a higher position than the top line of the edge protrusion 30j on the outer foot side. Note that the top line of the edge raised portion 30j may be provided at a higher position than the top line of the edge raised portion 30h.

As shown in FIG. 4, the lower surface 30b of the buffer member 30 is provided with a convex portion 32, a concave portion 34, and a peripheral convex portion 36. The convex portion 32 protrudes toward the facing surface 16 that faces the lower surface 30b. In this embodiment, the opposing surface 16 is exemplified by the upper surface 10b of the sole 10. When a rug such as an insole is interposed between the sole 10 and the cushioning member 30, the opposing surface 16 is the upper surface of the rug.

Although the arrangement of the protrusion 32 is not limited, the protrusion 32 of this embodiment is arranged at a position corresponding to the heel. Although there is no limitation on the shape of the convex portion 32, the convex portion 32 of this embodiment is an island-shaped portion having an elliptical planar shape in which the front-rear dimension is larger than the width dimension. Note that the ellipse in this specification includes not only an ellipse but also a shape similar to an ellipse such as an oval. The recess 34 is formed adjacent to the protrusion 32 and is recessed toward the upper 20 than the protrusion 32 . The recess 34 is interposed between the protrusion 32 and the peripheral protrusion 36 in the width direction. The recess 34 of this embodiment is formed in a circumferential shape surrounding the protrusion 32 in plan view. The peripheral convex portion 36 protrudes from the convex portion 32 toward the opposing surface 16 around the concave portion 34 .

In this embodiment, the contact area between the buffer member 30 and the opposing surface 16 (upper surface 10b) is changed according to the load F in order to change the displacement gradient. Specifically, when the buffer member 30 receives a predetermined first load F1 (low load), the peripheral convex portion 36 contacts the opposing surface 16, the convex portion 32 does not contact the opposing surface 16, and the buffer member 30 When the member 30 receives a predetermined second load F2 (high load), the peripheral convex portion 36 and the convex portion 32 contact the opposing surface 16. When the convex portion 32 comes into contact with the opposing surface 16, the contact area increases accordingly, the load F per unit area decreases, and the displacement gradient changes.

As an example, the first load F1 can be set based on the load F that the cushioning member 30 receives from the foot when the foot is inserted or when walking slowly, and the second load F2 can be set based on the load F that the cushioning member 30 receives from the foot when the foot is inserted or when walking slowly. It can be set based on the load F received from. The second load F2 is larger than the first load F1.

Also refer to FIGS. 6 and 7. 6 and 7 are longitudinal cross-sectional views of the buffer member 30 taken along the line AA, showing a cross section at the center of the convex portion 32 in the front-rear direction. FIG. 6 shows a state in which the buffer member 30 is receiving the first load F1, and FIG. 7 shows a state in which the buffer member 30 is receiving the second load F2. In this embodiment, the buffer member 30 is not bonded to the opposing surface 16 and is movable within the foot insertion portion 20a. Therefore, when the buffer member 30 receives the load F, it deforms in the width direction and its width dimension increases.

In the case of a low load shown in FIG. 6, the peripheral convex portion 36 is in contact with the opposing surface 16, and the lower surface 32d of the convex portion 32 is separated upward from the opposing surface 16 via a gap S32. When the load F increases from the state shown in FIG. 6, the peripheral convex portion 36 deforms so as to expand in the width direction while remaining in contact with the opposing surface 16. At the same time, the convex portion 32 moves downward, and the gap S32 gradually becomes smaller according to the load F, and when the load F exceeds the threshold value, the gap S32 disappears. At this time, the lower surface 32d of the convex portion 32 comes into contact with the opposing surface 16, and the convex portion 32 deforms so as to collapse in the vertical direction. When the load F further increases, the contact area between the lower surface of the convex portion 32 and the opposing surface 16 increases, leading to the state shown in FIG. 7. That is, compared to the case of a low load shown in FIG. 6, in the case of a high load shown in FIG. 7, the contact area of the buffer member 30 with the opposing surface 16 increases, the load F per unit area decreases, and the displacement The slope becomes smaller.

If the front-to-back dimension of the convex portion 32 is small, the front-to-back range in which the displacement gradient can be changed becomes narrow. Therefore, it is desirable that the front and rear dimensions of the convex portion 32 be large. Therefore, the convex portion 32 of this embodiment has an elliptical planar shape in which the front-rear dimension is larger than the width dimension.

Note that in the unloaded state where the foot is not inserted, the peripheral protrusion 36 may not contact the opposing surface 16, but in this embodiment, the peripheral protrusion 36 does not contact the opposing surface 16 even in the unloaded state. configured to make contact.

It is desirable that the convex portion 32 be able to smoothly move downward from a low load state to a high load state. Therefore, the buffer member 30 of this embodiment includes a main body portion 35 including a peripheral convex portion 36 and a movable portion 33 including a convex portion 32. By making the main body portion 35 and the movable portion 33 separate, the convex portion 32 can be easily moved.

The main body portion 35 has an external shape along the foot insertion portion 20a in plan view (see also FIGS. 2 and 3). An accommodating portion 37 that accommodates at least a portion of the movable portion 33 is provided at a widthwise intermediate portion of the main body portion 35 . The accommodating part 37 of this embodiment has a shape that can substantially accommodate the entire movable part 33. The accommodating portion 37 in this example has an elliptical planar shape in which the front and rear dimensions are larger than the width dimensions. In this embodiment, in order to slow the movement of the movable part 33, the inner circumferential surface 37j of the accommodating part 37 is formed in a tapered shape that becomes narrower on the lower side. When a downward load F is applied to the buffer member 30, the movable portion 33 slides within the housing portion 37 of the main body portion 35 and moves downward. The accommodating portion 37 has an opening 37h provided in the middle portion of the main body portion 35 in the width direction.

The outer peripheral surface 33e of the movable part 33 has a shape corresponding to the inner peripheral surface 37j. That is, the outer circumferential surface 33e of the movable portion 33 has an elliptical planar shape in which the front-rear dimension is larger than the width dimension. The outer circumferential surface 33e of the movable portion 33 has an elliptical frustum shape along the inner circumferential surface 37j. As shown in FIG. 6, the vertical dimensions of the movable part 33 are smaller than the vertical dimensions of the peripheral convex part 36, and have a size such that the outer circumferential surface 33e is caught in the middle of the housing part 37.

The planar shape of the buffer member 30 will be explained. FIG. 8 is a plan view showing the relationship between the peripheral wall surface 30p of the buffer member 30 and the foot insertion portion 20a of the upper 20. Note that the peripheral wall surface 30p is a side surface along the outer periphery of the buffer member 30. If the width of the buffer member 30 is too large, it becomes difficult to insert the buffer member 30 into the inside of the upper 20. Therefore, the gap S1 in the width direction between the peripheral wall surface 30p of the buffer member 30 and the foot insertion portion 20a of the upper 20 is configured to be larger than the gap S2 in the front-rear direction between the buffer member 30 and the upper 20. Note that the gap S1 is the sum of the gaps S1(a) and S1(b) on both sides in the width direction, and the gap S2 is the sum of the gaps S2(a) and S2(b) on both sides in the front and back direction.

Expansion of the buffer member 30 in the plane direction will be explained. FIG. 9 is a plan view showing the planar contour of the buffer member 30 when receiving a load. In this figure, the planar contour when no load is applied is shown by a broken line, and the planar contour when the second load F2 is applied is shown by a solid line. In order to disperse the load F in the width direction, the buffer member 30 of this embodiment is configured such that the elongation E1 in the width direction when receiving the load F is larger than the elongation E2 in the front-rear direction. The elongation E1 is the sum of the elongations E1(a) and E1(b) on both sides in the width direction, and the elongation E2 is the sum of the elongations E2(a) and E2(b) on both sides in the front-rear direction.

Refer to FIGS. 6 and 7. The main body portion 35 and the movable portion 33 can be formed from a variety of materials with desired characteristics. As an example, the main body portion 35 can be formed of a foamed resin foam such as EVA resin (ethylene vinyl acetate copolymer) or TPU resin (thermoplastic polyurethane). The movable part 33 may be made of the same material as the main body part 35, or may be made of a different material. The main body portion 35 and the movable portion 33 may each be composed of a single member, or may be composed of a plurality of members. These may be separate bodies, or foam materials of different hardness such as GEL material may be provided inside or on the surface. In this case, foot contact and cushioning properties can be changed.

The hardness of the buffer member 30 will be explained. The hardness of the material of the main body portion 35 and the material of the movable portion 33 may be the same or different. In this embodiment, the hardness of the material of the movable part 33 is higher than the hardness of the material of the main body part 35. Since the main body part 35 is soft, it feels good on the foot when the load is low, and because the movable part 33 is hard, it has high rigidity when the load is high, making it easy to ensure stability. In addition, when the exclusive area of the movable part 33 is large, the movable part 33 may be formed to be softer than the main body part 35 in order to obtain cushioning properties. Furthermore, the main body portion 35 may be made harder than the movable portion 33 in order to obtain desired characteristics.

The hardness of the material of the main body part 35 may be uniform as a whole, or may differ from part to part. In particular, the hardness of the material may be different between the portion 35e of the main body portion 35 on the outer foot side and the portion 35j on the inner foot side of the movable portion 33. In this embodiment, the hardness of the material of the inner foot side portion 35j is higher than the hardness of the material of the outer foot side portion 35e. During exercise, when a high load is applied to the medial side, deformation can be suppressed, making it easier to ensure stability. Note that, for example, when the shoe is used in a court-type sports shoe in which a load is applied to the outside, the portion 35e may be made harder than the portion 35j.

(Deformation limiting part)
The deformation limiting section 18 will be explained with reference to FIGS. 10 to 12. If the shock absorbing member 30 deforms excessively when subjected to a high load, there is a risk that stability may be reduced. Therefore, in this embodiment, a deformation limiting section 18 is provided to limit deformation of the buffer member 30 by a predetermined amount or more.

FIG. 10 is a graph showing the relationship between the load F and the displacement D of the buffer member 30 when it has the deformation limiting portion 18, and corresponds to FIG. 5. In this figure, a graph g3 shows the case where the deformation limiting section 18 is not included, and a graph g4 shows the case where the deformation limiting section 18 is included. When the deformation limiting portion 18 is provided, when the third load F3 is exceeded, the displacement D is suppressed and the displacement gradient becomes further smaller. The third load F3 is set to be larger than the second load F2, and the displacement gradient changes in three stages depending on the load F. With this configuration, stability can be ensured in a region where the load F is equal to or higher than the third load F3. The third load F3 can be set based on the load F that the cushioning member 30 receives from the foot especially during high-intensity exercise.

There is no limitation to the configuration of the deformation limiting section 18. For example, the deformation limiting portion 18 may be provided in a portion of the buffer member 30 that faces the lower surface 30b or the peripheral wall surface 30p. FIG. 11 is a cross-sectional view taken along line AA of the buffer member 30 including the deformation limiting portion 18, and corresponds to FIG. This figure shows a state where the third load F3 is applied. In the example of FIG. 11, the deformation limiting portion 18 includes a protruding portion 16p protruding from the opposing surface 16 and an abutting portion 36m provided on the buffer member 30. The contact portion 36m in this example is the inner wall in the width direction of the lower surface recess 36d provided on the lower surface 30b of the buffer member 30 (the lower surface of the peripheral convex portion 36). When the buffer member 30 receives the third load F3, the contact portion 36m contacts the protrusion 16p, and deformation of the peripheral convex portion 36 in the width direction is restricted.

FIG. 12 is a cross-sectional view taken along line AA of a buffer member including another deformation limiting portion 18, and corresponds to FIG. In the example of FIG. 12, the contact portion 36m is provided on the side surface of the peripheral convex portion 36 (the peripheral wall surface 30p of the buffer member 30), and the protrusion portion 16p is provided from the lower surface 30b of the buffer member 30 (the lower surface of the peripheral convex portion 36). It is placed in an outlying position. When the buffer member 30 receives the third load F3, the contact portion 36m provided on the side surface of the peripheral convex portion 36 comes into contact with the protrusion 16p, and deformation of the peripheral convex portion 36 in the width direction is restricted. In the examples of FIGS. 11 and 12, two protrusions 16p are provided, but one or more protrusions 16p may be provided.

The deformation limiting portion 18 can also be configured by increasing the friction coefficient μ of the lower surface 30b of the buffer member 30 (the lower surface of the peripheral convex portion 36) or the opposing surface 16. For example, if the friction coefficient μ is increased, movement of the peripheral convex portion 36 is restricted, and deformation of the buffer member 30 can be restricted.

The friction coefficient μ can be changed by changing the unevenness and surface roughness of the lower surface of the peripheral convex portion 36. For example, in order to change the surface roughness, the lower surface of the peripheral convex portion 36 may be mirror-finished, embossed, textured, or the like. Further, the friction coefficient μ can also be changed by attaching members having different friction coefficients to the surface of the main body portion 35. In this case, the friction coefficient μ can be lowered by attaching a low-friction material, and the friction coefficient μ can be increased by attaching a high-friction material. Further, the friction coefficient μ can also be changed by applying a substance that can change the lubricity to the surface of the main body portion 35.

See FIG. 13. The widthwise dimension of the outer foot side portion 35e in contact with the opposing surface 16 and the widthwise dimension of the inner foot side portion 35j in contact with the opposing surface 16 may be the same. , may be different. FIG. 13 is a cross-sectional view taken along line AA of the buffer member 30 having different widths on the inner and outer foot sides of the main body 35, and corresponds to FIG. In the cross-sectional view of FIG. 13, in the main body portion 35, the dimension Wcj on the inner foot side is larger than the dimension Wce on the outer foot side. In this example, since the dimension Wcj is larger than the dimension Wce, the contact area between the opposing surface 16 and the peripheral protrusion 36 becomes large, and the frictional force becomes large, making it difficult to move. As a result, inward sinking is restricted, making it easier to ensure stability. In addition, in order to cope with the internal and external load balance at the time of high loads, the dimension Wce may be larger than the dimension Wcj.

Refer to FIG. 14. The coefficient of friction μ between the main body portion 35 and the facing surface 16 may be uniform as a whole, or may be different for each portion. By increasing the friction coefficient μ in a portion, the movement and deformation of that portion can be reduced. FIG. 14 is a cross-sectional view taken along the line AA of the buffer member 30 in which the friction coefficient μ is different between the inner leg side and the outer leg side of the main body portion 35, and corresponds to FIG.

In the example shown in FIG. 14, the friction coefficient μj between the inner foot side portion 35j and the opposing surface 16 is higher than the friction coefficient μe between the outer foot side portion 35e and the opposing surface 16. In this case, when a high load is applied to the medial foot side during exercise, deformation can be suppressed, making it easier to ensure stability. In addition, in order to cope with the internal and external load balance at the time of high loads, the friction coefficient μe may be made higher than the friction coefficient μj.

The characteristics of the shoe 100 of the first embodiment configured as above will be explained. The shoe 100 of the first embodiment includes a sole 10, an upper 20 provided above the sole 10 and surrounding a foot insertion part 20a, and a buffer member 30 housed in the foot insertion part 20a. The lower surface 30b of the buffer member 30 includes a convex portion 32 that protrudes toward the opposing surface 16 facing the lower surface 30b, and a concave portion 34 adjacent to the convex portion 32 and recessed toward the upper 20 side with respect to the convex portion 32. A peripheral convex portion 36 that protrudes from the convex portion 32 toward the opposing surface 16 is provided around the concave portion 34 . When the buffer member 30 receives a predetermined first load F1, the peripheral protrusion 36 contacts the opposing surface 16, the protrusion 32 does not contact the opposing surface 16, and the buffer member 30 receives a predetermined load greater than the first load F1. When receiving the second load F2, the peripheral convex portion 36 and the convex portion 32 contact the opposing surface 16.

According to this configuration, the displacement of the cushioning member 30 with respect to the load can be increased during low loads when the protrusions 32 do not contact the opposing surface 16, resulting in better foot contact, and during high loads when the protrusions 32 contact the opposing surface 16. Since the displacement of the buffer member 30 with respect to the load can be reduced, stability can be ensured.

The widthwise gap S1 between the peripheral wall surface 30p of the buffer member 30 and the upper 20 is larger than the longitudinal direction gap S2 between the peripheral wall surface 30p and the upper 20. In this case, since the widthwise gap S1 is large, the buffer member 30 can be easily inserted into the foot insertion portion 20a.

The concave portion 34 is interposed between the convex portion 32 and the peripheral convex portion 36 in the width direction, and the buffer member 30 expands in the width direction more than in the front-rear direction when receiving a downward load. In this case, when a load is applied, the load can be distributed in the width direction, so stability and comfort can be adjusted.

A deformation limiting section 18 is provided to limit deformation of the buffer member 30 by more than a predetermined amount. In this case, excessive deformation can be restricted. Multiple stages (3 stages) of changes ensure even greater stability under high loads.

The deformation limiting portion 18 is provided at a portion facing the lower surface 30b or the outer circumferential side of the buffer member 30. In this case, excessive deformation can be limited by a simple configuration.

The deformation limiter 18 includes a protrusion 16p that protrudes from the opposing surface 16. In this case, excessive deformation can be limited by a simple configuration.

The buffer member 30 has a main body part 35 including a peripheral convex part 36 and a movable part 33 including a convex part 32. The main body part 35 has an outer shape along the foot insertion part 20a, and A housing portion 37 is provided to accommodate at least a portion of the movable portion 33, and the movable portion 33 moves downward with respect to the main body portion 35 when a downward load is applied to the buffer member 30. In this case, by making the movable part 33 separate, the movable part 33 can smoothly move downward when a load is applied. By separating them, they can be manufactured under conditions suitable for each.

The accommodating portion 37 includes an opening 37h provided in the middle portion of the main body portion 35 in the width direction. In this case, by including the opening 37h, the movable part 33 can move downward within the opening 37h.

The inner circumferential surface 37j of the accommodating portion 37 is formed in a tapered shape. In this case, by adjusting the taper shape, it becomes easy to adjust the displacement with respect to the load to a desired characteristic.

The outer circumferential surface of the movable portion 33 has a shape along the inner circumferential surface 37j. In this case, the movable part 33 can move smoothly.

The movable portion 33 is located upwardly away from the opposing surface 16 when the buffer member 30 receives the first load F1. In this case, when the load is low, the displacement with respect to the load can be increased to improve the foot contact when the foot enters.

The movable portion 33 has an elliptical planar shape in which the front and rear dimensions are larger than the width dimensions. In this case, since the front-rear dimension is large, the load versus displacement characteristics can be adjusted over a wide range in the front-rear direction.

The hardness of the material of the movable part 33 is different from the hardness of the material of the main body part 35. In this case, since the main body portion 35 and the movable portion 33 can be made of materials with suitable hardness, desired load displacement characteristics can be easily achieved.

The hardness of the material of the main body portion 35 is different between a portion 35j on the inner foot side and a portion 35e on the outer foot side with the movable portion 33 in the width direction. In this case, the medial foot side portion and the lateral foot side portion can be made of materials with suitable hardness, so that desired load displacement characteristics can be easily achieved.

The area of the main body portion 35 in contact with the facing surface 16 is different between the inner foot side portion 35j and the outer foot side portion 35e with the movable portion 33 in between. In this case, the respective areas can be set in accordance with the internal and external load balance during high loads, so desired load displacement characteristics can be easily achieved.

The coefficient of friction between the main body portion 35 and the facing surface 16 is different between a portion 35j on the inner foot side and a portion 35e on the outer foot side with the movable portion 33 in between. In this case, the deformation characteristics can be adjusted by setting the respective friction coefficients in accordance with the internal and external balance of the load at high loads, so that the desired load displacement characteristics can be easily achieved.

[Second embodiment]
The configuration of a shoe 200 according to a second embodiment of the present invention will be described with reference to FIGS. 15 to 20. In the drawings and description of the second embodiment, components and members that are the same or equivalent to those of the first embodiment are given the same reference numerals. Descriptions that overlap with those of the first embodiment will be omitted as appropriate, and configurations that are different from the first embodiment will be mainly described. FIG. 15 is a perspective view schematically showing a shoe 200 according to the second embodiment. FIG. 16 is a side view showing the shoe 200. FIG. 17 is a plan view showing the shoe 200. FIG. 18 is a sectional view taken along line BB in FIG. 17. The tongue of the shoe is not shown in FIGS. 15 and 16.

(Interlocking member)
The shoe 200 of this embodiment differs from the shoe 100 of the first embodiment in that it includes an interlocking member 52, but the other configurations are the same. Therefore, the interlocking member 52 will be explained with emphasis. When the cushioning member 30 deforms under the load F, the gap between the upper 20 and the instep may expand and the fit may deteriorate. Therefore, the shoe 200 of this embodiment includes an interlocking member 52 that deforms the upper 20 in conjunction with the deformation when the buffer member 30 deforms under the load F.

The interlocking member 52 of this embodiment includes a sole side portion 52d, an extending portion 52p, and a fixing portion 52f. The sole side portion 52d is a portion that is interposed between the sole of the foot and the upper surface 30e of the buffer member 30 and extends substantially in the width direction. The extending portions 52p are portions that extend from both widthwise ends of the upper surface 30e and extend substantially in the vertical direction. The fixing portion 52f is a portion provided at the upper end of the extending portion 52p and fixed to the upper 20. The fixing portion 52f is fixed to regions on both sides of the upper 20 across the central opening 20c in the width direction by sewing or the like. The fixing portion 52f may be integrally fixed to the upper 20 by an eyelet 20h. As an example, the sole side portion 52d, the extending portion 52p, and the fixing portion 52f are integrally formed of a flexible sheet material such as cloth.

As shown in FIG. 17, the interlocking member 52 of this embodiment is provided at a position away from the opening 20b of the upper 20. Further, the extending portion 52p of the interlocking member 52 is fixed to the upper 20 via a fixing portion 52f on the front side of the shoe opening 20b. In this case, the cushioning member 30 can be easily inserted into the foot insertion portion 20a through the shoe opening 20b and removed from the shoe opening 20b.

As shown in FIG. 18, the sole side portion 52d is disposed in contact with or close to the upper surface 30e of the buffer member 30, and when a load F is applied from the sole of the foot, the extending portion 52p and the upper surface 30e of the buffer member 30 A downward tension T acts on both. When the tension T acts on the extending portion 52p, a downward force P acts on the fixed portion 52f and the upper 20 in conjunction with this. As a result, the upper 20 is pulled downward, thereby reducing the increase in the gap between the upper 20 and the instep. That is, since the interlocking member 52 is interposed between the sole of the foot and the upper surface 30e of the buffer member 30, the upper 20 and the interlocking member 52 sink together with the buffer member 30. This mechanism allows the upper 20 and the buffer member 30 to fit the foot.

The interlocking member 52 may have a cylindrical portion or a bag-shaped portion that encloses the foot from the viewpoint of ensuring support properties. In this case, when the buffer member 30 is deformed, the upper 20 is reliably pulled downward.

19 and 20 are side views showing another example of the shape of the interlocking member 52. The interlocking member 52 in FIG. 19 differs from the interlocking member 52 in FIG. 16 in that it has a rear portion 52h extending rearward from the midfoot, but the other configurations are the same. The rear portion 52h may extend to a region corresponding to the heel. The upper portion of the rear portion 52h is fixed to the inside of the upper 20 by sewing or the like. In this example, the rear end portion of the rear portion 52h is formed into a cylindrical shape.

In the example of FIG. 20, the interlocking member 52 differs from the interlocking member 52 of FIG. 16 in that it has a front portion 52j extending forward from the midfoot, but the other configurations are the same. The front portion 52j may extend to an area corresponding to the toe. The front part 52j may be formed in a bag shape or a cylindrical shape to enclose the forefoot part of the inserted foot. In this example, the front part 52j is formed into a closed bag shape. The upper portion of the front portion 52j may be fixed to the inside of the upper 20, but is not fixed in this example.

The shoe 200 of this embodiment has the same effect as the first embodiment, and since the upper 20 is pulled downward in conjunction with the deformation of the buffer member 30, there is a gap between the upper 20 and the instep during high loads. The fit is improved without excessively widening the gap. In addition, comfort can be maintained at low loads.

Examples of embodiments of the present invention have been described above in detail. The embodiments described above are merely specific examples of implementing the present invention. The contents of the embodiments do not limit the technical scope of the present invention, and many design changes such as changes, additions, and deletions of constituent elements may be made without departing from the spirit of the invention defined in the claims. It is possible. In the above-mentioned embodiment, contents that allow such design changes are explained with the notations such as "in the embodiment" and "in the embodiment", but the design does not include such notations. This does not mean that changes are not allowed. Furthermore, the hatching in the drawings does not limit the material of the hatched object.

[Modified example]
Modifications will be described below. In the drawings and description of the modified example, the same reference numerals are given to the same or equivalent components and members as in the embodiment. Explanation that overlaps with the embodiment will be omitted as appropriate, and configurations that are different from the embodiment will be mainly explained.

[First modification]
In the description of the first embodiment, an example was shown in which the buffer member 30 has a single movable part 33, but the present invention is not limited to this. The buffer member 30 may have a plurality of movable parts 33. FIG. 21 is a plan view of the buffer member 30 according to the first modification, and corresponds to FIG. 2. In the buffer member 30 of FIG. 21, a plurality of movable parts 33 are provided spaced apart in the front-rear direction. In the buffer member 30 of this example, movable parts 33 each having an elliptical shape in plan view are provided in a part corresponding to the heel and a part corresponding to the toe. The movable portion 33 is not limited to this position, but may be placed at a location where the load F is easily applied. In addition, in order to cope with the front-back balance of the load at the time of high load, the movable part 33 may be provided in either the part corresponding to the heel or the part corresponding to the toe.

Further, the size and deformation characteristics of the movable portion 33 may be adjusted between the forefoot portion and the rear foot portion. In this case, for example, by making the hindfoot more deformable and making the forefoot more resilient, the hindfoot can provide cushioning while the forefoot provides more repulsion, and the heel Shoes suitable for runners who land on the ground can be provided. Moreover, by having a plurality of movable parts 33, the size and deformation characteristics of the movable parts 33 can be changed according to the landing pattern of the wearer.

[Other variations]
In the description of the first embodiment, an example in which the protruding portion 16p is provided as the deformation limiting portion 18 is shown, but the present invention is not limited to this. For example, instead of the protruding portion 16p, a sheet member that can increase the frictional force between the main body portion 35 and the movable portion 33 may be interposed between the main body portion 35 and the movable portion 33. For example, a tape having a high coefficient of friction may be attached to one of these surfaces.

In the description of the first embodiment, an example is shown in which the movable part 33 has an elliptical planar shape, but the present invention is not limited to this, and the movable part 33 has various shapes depending on desired characteristics. You can. Hereinafter, first to fourth shape examples of the movable portion 33 will be explained. 22 to 25 are plan views showing first to fourth shape examples of the buffer member 30, and correspond to FIG. 2. In the buffer member 30 of the first shape example shown in FIG. 22, the movable portion 33 has a planar shape extending back and forth from a portion corresponding to the heel to a portion corresponding to the midfoot. In this case, for example, by making the part corresponding to the heel more deformable and making the midfoot part more resilient, the part corresponding to the heel will provide cushioning and the midfoot part will provide repulsion when running. This makes it possible to provide shoes suitable for runners who land on their heels. Moreover, by having the movable part 33 in this shape, the size and deformation characteristics of the movable part 33 can be changed according to the landing pattern of the wearer.

In the buffer member 30 of the second shape example shown in FIG. 23, the movable portion 33 has a planar shape extending back and forth from a portion corresponding to the heel to a portion corresponding to the toe. In this way, the movable portion 33 may have various longitudinal lengths ranging from a portion of the buffer member 30 to the entire area, depending on desired characteristics. Further, when the movable part 33 has this shape, the shoe can be made to have a large amount of deformation by making the movable part 33 soft when comfort is important rather than for exercise.

In the buffer member 30 of the third shape example shown in FIG. 24, the movable portion 33 has a planar shape extending back and forth from a portion corresponding to the heel to a portion corresponding to the midfoot. In this example, a portion of the movable portion 33 corresponding to the middle foot has a shape closer to one side in the width direction (for example, the outer foot side). When having the movable part 33 in this shape, by making the movable part 33 soft and making the main body part 35 hard, the shoe can have a high pronation suppressing effect.

In the buffer member 30 of the fourth shape example shown in FIG. 25, the movable portion 33 has a polygonal planar shape. In this example, the movable portion 33 has a hexagonal planar shape extending from a portion corresponding to the midfoot to a portion corresponding to the toe. When the movable part 33 has this shape, it is easy to realize characteristics suitable for runners who land on the forefoot. Note that the polygonal shape is not essential, and each corner may be formed in a curved shape.

In the description of the first embodiment, an example was shown in which the convex portion 32 and the peripheral convex portion 36 are separate bodies, but the present invention is not limited to this. The convex portion 32 and the peripheral convex portion 36 may be integrated. 26 and 27 are longitudinal sectional views taken along line AA of the buffer member 30 in which the convex portion 32 and the peripheral convex portion 36 are integrated, and correspond to FIGS. 6 and 7. FIG. 26 shows the buffer member 30 in an unloaded state, and FIG. 27 shows the buffer member 30 in a state receiving the second load F2.

As shown in FIG. 26, the cross-sectional contour of the convex portion 32 sandwiched between the concave portions 34 on the opposing surface 16 side is approximately M-shaped. The peripheral convex portion 36 is in contact with the opposing surface 16 at two or more locations with the convex portion 32 in between. In the cross-sectional view of FIG. 26, the total dimension of the area of the peripheral convex portion 36 that is in contact with the opposing surface 16 under no load may be 30% or more of the width dimension Wa of the entire buffer member 30. That is, the sum of the widthwise dimension Wce of the region of the peripheral protrusion 36 that is in contact with the opposing surface 16 on the outer foot side and the widthwise dimension Wcj of the region that is in contact with the opposing surface 16 on the inner foot side. may be 30% or more of the width dimension Wa. Further, the sum of the dimension Wce and the dimension Wcj may be 70% or less of the width dimension Wa.

Further, in the cross-sectional view of FIG. 26, the vertical distance Hp between the portion 32p of the convex portion 32 that is closest to the opposing surface 16 in the vertical direction and the opposing surface 16 may be 2 mm or more in a no-load state. Further, the vertical distance Hp may be 10 mm or less.

Further, in the cross-sectional view of FIG. 26, the vertical distance Hd between the portion 34d of the recess 34 that is farthest in the vertical direction from the opposing surface 16 and the portion 32p may be 1 mm or more in a no-load state. Further, the vertical distance Hd may be 13 mm or less.

Further, in the cross-sectional view of FIG. 26, the vertical thickness Ha of the buffer member 30 on the vertical line passing through the portion 32p may be 10 mm or more in a no-load state. Moreover, the upper and lower thicknesses Ha may be 30 mm or less.

As shown in FIG. 27, when the buffer member 30 receives the second load F2, the convex portion 32 contacts the opposing surface 16, similar to the first embodiment.

In the description of the second embodiment, an example was shown in which the sole side portion 52d is interposed between the sole of the foot and the upper surface 30e of the cushioning member 30, but the present invention is not limited to this. FIG. 28 is a cross-sectional view taken along line BB of a shoe 300 according to a modified example, and corresponds to FIG. 18. This modification differs from the second embodiment in that the sole side portion 52d is interposed between the buffer member 30 and the sole 10, and the other configurations are the same. In this modification, the extending portions 52p extend from both ends in the width direction of the sole side portion 52d. According to this modification, as in the second embodiment, the upper 20 and the interlocking member 52 sink together with the buffer member 30, so the upper 20 and the buffer member 30 fit the foot.

Each of the above-mentioned modifications has the same functions and effects as the above-described embodiment.

Any combination of the embodiments and variations described above are also useful as embodiments of the invention. A new embodiment resulting from the combination has the effects of each of the combined embodiments and modifications.

INDUSTRIAL APPLICATION This invention can be utilized for shoes in connection with the cushioning member of shoes.

DESCRIPTION OF SYMBOLS 10... Sole, 16... Opposing surface, 18... Deformation limiting part, 20... Upper, 20a... Foot insertion part, 30... Cushioning member, 30b... Lower surface, 30e. ...Top surface, 30p...Peripheral wall surface, 32...Convex portion, 32d...Bottom surface, S32...Gap, 33...Movable part, 33e...Outer circumferential surface, 34...Concave portion, 35... Main body part, 36... Peripheral convex part, 36d... Lower surface recessed part, 36m... Contact part, 37... Accommodation part, 37h... Opening part, 37j... Inner circumference Surface, 52... Interlocking member, 52d... Sole side part, 52p... Extension part, 100, 200... Shoe.

Claims (16)

Sole and
an upper provided above the sole and surrounding the foot insertion portion;
a buffer member housed within the foot insertion portion;
Equipped with
The lower surface of the buffer member includes a convex portion protruding toward the opposite surface facing the lower surface, a concave portion adjacent to the convex portion and recessed toward the upper side of the convex portion, and a concave portion around the concave portion. a peripheral convex portion protruding from the convex portion toward the opposing surface,
When the buffer member receives a predetermined first load, the peripheral convex portion contacts the opposing surface, and the convex portion does not contact the opposing surface,
When the buffer member receives a predetermined second load greater than the first load, the peripheral convex portion and the convex portion contact the opposing surface ,
A shoe characterized in that a widthwise gap between the circumferential wall surface of the buffer member and the upper is larger than a longitudinal gap between the circumferential wall surface and the upper . Sole and
an upper provided above the sole and surrounding the foot insertion portion;
a buffer member housed within the foot insertion portion;
Equipped with
The lower surface of the buffer member includes a convex portion protruding toward the opposite surface facing the lower surface, a concave portion adjacent to the convex portion and recessed toward the upper side of the convex portion, and a concave portion around the concave portion. a peripheral convex portion protruding from the convex portion toward the opposing surface,
When the buffer member receives a predetermined first load, the peripheral convex portion contacts the opposing surface, and the convex portion does not contact the opposing surface,
When the buffer member receives a predetermined second load greater than the first load, the peripheral convex portion and the convex portion contact the opposing surface ,
The recess is interposed between the protrusion and the peripheral protrusion in the width direction,
The shoe is characterized in that the cushioning member elongates in the width direction more than in the front-rear direction when receiving a downward load. Sole and
an upper provided above the sole and surrounding the foot insertion portion;
a buffer member housed within the foot insertion portion;
Equipped with
The lower surface of the buffer member includes a convex portion protruding toward the opposite surface facing the lower surface, a concave portion adjacent to the convex portion and recessed toward the upper side of the convex portion, and a concave portion around the concave portion. a peripheral convex portion protruding from the convex portion toward the opposing surface,
When the buffer member receives a predetermined first load, the peripheral convex portion contacts the opposing surface, and the convex portion does not contact the opposing surface,
When the buffer member receives a predetermined second load greater than the first load, the peripheral convex portion and the convex portion contact the opposing surface ,
A shoe characterized in that a deformation restricting portion is provided for restricting deformation of the buffer member by a predetermined amount or more . The shoe according to claim 3 , wherein the deformation limiting portion is provided at a portion facing the lower surface or outer peripheral side of the buffer member. The shoe according to claim 4 , wherein the deformation limiting portion includes a protrusion that protrudes from the opposing surface. Sole and
an upper provided above the sole and surrounding the foot insertion portion;
a buffer member housed within the foot insertion portion;
Equipped with
The lower surface of the buffer member includes a convex portion protruding toward the opposite surface facing the lower surface, a concave portion adjacent to the convex portion and recessed toward the upper side of the convex portion, and a concave portion around the concave portion. a peripheral convex portion protruding from the convex portion toward the opposing surface,
When the buffer member receives a predetermined first load, the peripheral convex portion contacts the opposing surface, and the convex portion does not contact the opposing surface,
When the buffer member receives a predetermined second load greater than the first load, the peripheral convex portion and the convex portion contact the opposing surface ,
The buffer member has a main body portion including the peripheral convex portion, and a movable portion including the convex portion,
The main body portion has an outer shape that follows the foot insertion portion, and is provided with a housing portion that accommodates at least a portion of the movable portion,
The movable part moves downward with respect to the main body when a downward load is applied to the buffer member,
The accommodating portion includes an opening provided in a widthwise intermediate portion of the main body portion,
The shoe is characterized in that the inner circumferential surface of the accommodating portion is formed in a tapered shape . The shoe according to claim 6 , wherein the outer peripheral surface of the movable part has a shape that follows the inner peripheral surface. The shoe according to claim 6 or 7 , wherein the movable part is located upwardly away from the opposing surface when the buffer member receives the first load. The shoe according to any one of claims 6 to 8 , wherein a plurality of the movable parts are provided spaced apart in the front-rear direction. Sole and
an upper provided above the sole and surrounding the foot insertion portion;
a buffer member housed within the foot insertion portion;
Equipped with
The lower surface of the buffer member includes a convex portion protruding toward the opposite surface facing the lower surface, a concave portion adjacent to the convex portion and recessed toward the upper side of the convex portion, and a concave portion around the concave portion. a peripheral convex portion protruding from the convex portion toward the opposing surface,
When the buffer member receives a predetermined first load, the peripheral convex portion contacts the opposing surface, and the convex portion does not contact the opposing surface,
When the buffer member receives a predetermined second load greater than the first load, the peripheral convex portion and the convex portion contact the opposing surface ,
The buffer member has a main body portion including the peripheral convex portion, and a movable portion including the convex portion,
The main body portion has an outer shape that follows the foot insertion portion, and is provided with a housing portion that accommodates at least a portion of the movable portion,
The movable part moves downward with respect to the main body when a downward load is applied to the buffer member,
The shoe is characterized in that the movable part has an oval planar shape in which the front-rear dimension is larger than the width dimension . 11. The shoe according to claim 6 , wherein the hardness of the material of the movable part is different from the hardness of the material of the main body part. The shoe according to any one of claims 6 to 11 , wherein the hardness of the material of the main body portion is different between a portion on the inner foot side and a portion on the outer foot side with the movable portion sandwiched in the width direction. The shoe according to any one of claims 6 to 12 , wherein the area of the main body portion in contact with the opposing surface is different between a portion on the inner foot side and a portion on the outer foot side with the movable portion sandwiched therebetween. . The shoe according to any one of claims 6 to 13 , wherein a coefficient of friction between the main body portion and the opposing surface is different between a portion on the inner foot side and a portion on the outer foot side with the movable portion sandwiched therebetween. . Sole and
an upper provided above the sole and surrounding the foot insertion portion;
a buffer member housed within the foot insertion portion;
Equipped with
The lower surface of the buffer member includes a convex portion protruding toward the opposite surface facing the lower surface, a concave portion adjacent to the convex portion and recessed toward the upper side of the convex portion, and a concave portion around the concave portion. a peripheral convex portion protruding from the convex portion toward the opposing surface,
When the buffer member receives a predetermined first load, the peripheral convex portion contacts the opposing surface, and the convex portion does not contact the opposing surface,
When the buffer member receives a predetermined second load greater than the first load, the peripheral convex portion and the convex portion contact the opposing surface ,
further comprising an interlocking member that pulls the upper downward when the buffer member receives a downward load;
The interlocking member is fixed at a position away from the opening of the upper,
The shoe is characterized in that the interlocking member has a sole side portion located on the upper surface side of the buffer member, and an extending portion extending upward from both widthwise ends of the sole side portion . Sole and
an upper provided above the sole and surrounding the foot insertion portion;
a buffer member housed within the foot insertion portion;
Equipped with
The lower surface of the buffer member includes a convex portion protruding toward the opposite surface facing the lower surface, a concave portion adjacent to the convex portion and recessed toward the upper side of the convex portion, and a concave portion around the concave portion. a peripheral convex portion protruding from the convex portion toward the opposing surface,
When the buffer member receives a predetermined first load, the peripheral convex portion contacts the opposing surface, and the convex portion does not contact the opposing surface,
When the buffer member receives a predetermined second load greater than the first load, the peripheral convex portion and the convex portion contact the opposing surface ,
further comprising an interlocking member that pulls the upper downward when the buffer member receives a downward load;
The shoe is characterized in that the interlocking member has a cylindrical or bag-shaped portion that encloses the foot .

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